Sunday, March 17, 2013

Arizona's capital of Phoenix and neighboring towns in Maricopa County have undergone a major population boom in the last 40 years. The effects of this boom are seen in everything from the expansion of town and cities to an increased demand for fresh water. Michelle Fuller from Gilbert wrote asking to see these changes to the landscape; most visible in this series of images is how city streets and development are now covering the land that previously was used for agriculture.

Of course, it’s an easy city to pick on. The nation’s 13th largest metropolitan area (nudging out Detroit) crams 4.3 million people into a low bowl in a hot desert, where horrific heat waves and windstorms visit it regularly. It snuggles next to the nation’s largest nuclear plant and, having exhausted local sources, it depends on an improbable infrastructure to suck water from the distant (and dwindling) Colorado River.

In Phoenix, you don’t ask: What could go wrong? You ask: What couldn’t?

And that’s the point, really. Phoenix’s multiple vulnerabilities, which are plenty daunting taken one by one, have the capacity to magnify one another, like compounding illnesses. In this regard, it’s a quintessentially modern city, a pyramid of complexities requiring large energy inputs to keep the whole apparatus humming. The urban disasters of our time -- New Orleans hit by Katrina, New York City swamped by Sandy -- may arise from single storms, but the damage they do is the result of a chain reaction of failures -- grids going down, levees failing, back-up systems not backing up. As you might expect, academics have come up with a name for such breakdowns: infrastructure failure interdependencies. You wouldn’t want to use it in a poem, but it does catch an emerging theme of our time.

Phoenix’s pyramid of complexities looks shakier than most because it stands squarely in the crosshairs of climate change. The area, like much of the rest of the American Southwest, is already hot and dry; it’s getting ever hotter and drier, and is increasingly battered by powerful storms. Sandy and Katrina previewed how coastal cities can expect to fare as seas rise and storms strengthen. Phoenix pulls back the curtain on the future of inland empires. If you want a taste of the brutal new climate to come, the place to look is where that climate is already harsh, and growing more so -- the aptly named Valley of the Sun.

In Phoenix, it’s the convergence of heat, drought, and violent winds, interacting and amplifying each other that you worry about. Generally speaking, in contemporary society, nothing that matters happens for just one reason, and in Phoenix there are all too many “reasons” primed to collaborate and produce big problems, with climate change foremost among them, juicing up the heat, the drought, and the wind to ever greater extremes, like so many sluggers on steroids. Notably, each of these nemeses, in its own way, has the potential to undermine the sine qua non of modern urban life, the electrical grid, which in Phoenix merits special attention.

If, in summer, the grid there fails on a large scale and for a significant period of time, the fallout will make the consequences of Superstorm Sandy look mild. Sure, people will hunt madly for power outlets to charge their cellphones and struggle to keep their milk fresh, but communications and food refrigeration will not top their list of priorities. Phoenix is an air-conditioned city. If the power goes out, people fry.